Cheap flights from Portland, Maine to London from $319
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to London departing on 8/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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JetBlue flights from Portland, Maine to London Heathrow Airport
Our best JetBlue deals on Portland, Maine to London Heathrow Airport flight tickets
Air Canada flights from Portland, Maine to London Heathrow Airport
Our best Air Canada deals on Portland, Maine to London Heathrow Airport flight tickets
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How to get the cheapest flight ticket from Portland, Maine to London Heathrow Airport
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Portland, Maine and London Heathrow Airport?
What is the cheapest month to fly to London Heathrow Airport?
The month of April is, on average, the cheapest month to fly to London Heathrow Airport from Portland, Maine, with most prices found around $721. If you’re not able to fly to London Heathrow Airport in April, then May is your next best option. Flight prices from Portland, Maine to London Heathrow Airport during May average around $750.
What is the cheapest day to depart on your flight to London Heathrow Airport?
Our data shows that Sunday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $852. The most expensive day to fly to London Heathrow Airport is Wednesday, with ticket prices averaging around $1,003.
What is the cheapest airline that flies from Portland to London Heathrow?
JetBlue, Air Canada, and KLM are the most popular carriers operating from Portland to London Heathrow
What airlines fly to London Heathrow Airport?
British Airways, Delta and Virgin Atlantic are the top three most popular airlines that fly to London Heathrow Airport from Portland, Maine according to our data. British Airways is the first choice among our users, with 48% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 19 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.
When to book flights from Portland, Maine to London Heathrow Airport
Cheap Portland, Maine to London Heathrow Airport (PWM to LHR) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to London Heathrow Airport
How far is Portland to London Heathrow by plane?
The distance between Portland and London Heathrow is about 3170.3 mi. In terms of flight time, this usually takes a little over 9h 35m.
When did momondo last update prices for flights from Portland Airport to London Heathrow Airport?
Prices for flights from Portland Airport to London Heathrow Airport refresh daily.
How many operators does momondo search for flights from Portland Airport to London Heathrow Airport?
There are 3 operators available for flights from Portland Airport to London Heathrow Airport as of June 2025.
How old do you have to be to fly from Portland Airport to London Heathrow Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Portland, Maine to London Heathrow Airport?
Based on momondo bookings for flights between Portland, Maine and London Heathrow Airport, the leading airline is United Airlines, making up 54% of the total bookings. Other popular airlines include Delta with 28% and JetBlue with 17%.
Best airlines flying from Portland, Maine to London Heathrow Airport
Compare and see reviews for airlines that fly from Portland, Maine to London Heathrow Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $586 | Free Cancellation | Rating 7.3 2,921 reviews | |||
| PriceFrom $665 | Free Cancellation | Rating 7.4 8,840 reviews | |||
| PriceFrom $825 | Free Cancellation | Rating 8.0 7,965 reviews |
Traveling to a place near London?
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Why should I use momondo to find a flight deal from Portland to London?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Portland.
Can I find flights from Portland to London with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to London from Portland with this policy.
How can momondo help me find flights from Portland to London?
Once you have performed a search for Portland to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Portland to London right now. Can momondo alert me if prices change?
If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Portland and alert you when they change.